I grew up in provo, and live a few miles from it now, but I've never been to this "chadders".
From what i hear, it's a shameless ripoff of in-n-out.
"5 guys" has been expanding through utah pretty rapidly and i agree that it's pretty good, though i don't understand what the big idea with bread & butter pickles is, and i think their mushrooms are some sort of prank.
We have a weird fast food dynamic in the provo/orem area because there's a culture built up over the last several decades where there are always a dozen or so trust fund kids attending the BYU school of business management who have their parents set them up with a small business somewhere in town - usually a new business - and then theoretically sell it when they graduate.
And some fraction of them are in the franchise restaurant business. We always have a few oddball chains we've never heard of popping up and going out of business.
We had a Jerry's for a few years. I never ate there.
Down the road from me a bit is an "ez take-out" burger franchise. I was curious, so i tried it, and it was terrible. I tried it again a few weeks later and it was worse. I'm astounded that they're still in business. Probably some privileged kid burning through his inheritance who hasn't gotten to the section in business school where they tell you that if your product is horrible you won't have any repeat business or word-of-mouth advertising.
Edit: Just looked up the location of the Provo "chadder's". It's a block north of where i went to highschool. I've seen a lot of businesses fail in that location, including a sub shop that was pretty ok. Also, that school was torn down last year and isn't coming back. It's near a lot of low-income rental property, and a few blocks from BYU, so the numbers look good on paper - it's just that most businesses that have been in that building don't exist anymore.